Recent Solutions
Achievements
Cheevos
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
05AB1E
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Calendar
MeWhenI
💎
409
28ms
19 hours ago
Diamonds
JOrE20
🥉
1,475
5ms
31 hours ago
Hexdump
JOrE20
14,248
17ms
31 hours ago
Fizz Buzz
ndren
76
5ms
2 days ago
Fizz Buzz
CornerMercury
76
5ms
2 days ago
Quine
ndren
🥉
259
5ms
2 days ago
Calendar
FortuiteMan
🥈
476
19ms
2 days ago
Polyominoes
JOrE20
8,576
8ms
3 days ago
ISBN
FortuiteMan
🥉
132
9ms
5 days ago
Lucky Numbers
FortuiteMan
🥈
221
3,106ms
12 days ago
Recamán
FortuiteMan
🥈
167
99ms
12 days ago
Time Distance
FortuiteMan
💎
418
11ms
14 days ago
Tutorial
Natanaelel
111
5ms
17 days ago
Partition Numbers
FortuiteMan
🥈
232
53ms
17 days ago
Smith Numbers
FortuiteMan
💎
288
798ms
19 days ago
Sierpiński Triangle
FortuiteMan
🥈
276
6ms
25 days ago
Pernicious Numbers
FortuiteMan
106
6ms
25 days ago
Pernicious Numbers (Long)
FortuiteMan
🥈
110
259ms
25 days ago
Leyland Numbers
FortuiteMan
🥈
276
1,898ms
26 days ago
Trinomial Triangle
FortuiteMan
🥈
83
6ms
25 Jan 2026
Rijndael S-box
FortuiteMan
🥈
804
8ms
24 Jan 2026
Van Eck Sequence
MeWhenI
💎
170
1,051ms
18 Jan 2026
Kolakoski Sequence
MeWhenI
💎
83
12ms
18 Jan 2026
Zeckendorf Representation
FortuiteMan
🥈
130
14ms
18 Jan 2026
Kolakoski Sequence
FortuiteMan
🥈
84
12ms
16 Jan 2026
Tutorial
Mefred
650
5ms
15 Jan 2026
Trinomial Triangle
KatieLG-Transpiler
5,194
6ms
9 Jan 2026
Tower of Hanoi
KatieLG-Transpiler
12,074
8ms
9 Jan 2026
Taxicab Numbers
KatieLG-Transpiler
7,994
6ms
9 Jan 2026
Sphenic Numbers
KatieLG-Transpiler
27,070
14ms
9 Jan 2026
Semiprime Numbers
KatieLG-Transpiler
38,983
19ms
9 Jan 2026
Polygon Triangulations
KatieLG-Transpiler
9,990
8ms
9 Jan 2026
Partition Numbers
KatieLG-Transpiler
1,513
4ms
9 Jan 2026
Odd Polyomino Tiling
KatieLG-Transpiler
61,072
30ms
9 Jan 2026
Kaprekar Numbers
KatieLG-Transpiler
🥉
972
4ms
9 Jan 2026
Highly Composite Numbers
KatieLG-Transpiler
940
4ms
9 Jan 2026
Hexagonal Spiral
KatieLG-Transpiler
3,745
6ms
9 Jan 2026
Apéry’s Constant
KatieLG-Transpiler
1,496
4ms
9 Jan 2026
Quine
prestosilver
🥉
259
4ms
7 Jan 2026
Tutorial
prestosilver
271
5ms
7 Jan 2026
Inventory Sequence
FortuiteMan
💎
106
29ms
6 Jan 2026
Mandelbrot
JOrE20
30,450
12ms
5 Jan 2026
Tongue-twisters
JOrE20
1,240
4ms
5 Jan 2026
𝑒
JOrE20
917
4ms
5 Jan 2026
Van Eck Sequence
FortuiteMan
🥈
199
693ms
3 Jan 2026
Gijswijt’s Sequence
FortuiteMan
💎
193
4,848ms
2 Jan 2026
Look and Say
FortuiteMan
💎
261
13ms
30 Dec 2025
Fractions
MeWhenI
💎
54
58ms
29 Dec 2025
Tower of Hanoi
FortuiteMan
🥈
120
11ms
24 Dec 2025
Day of Week
FortuiteMan
331
16ms
24 Dec 2025
Fractions
FortuiteMan
🥈
66
6ms
24 Dec 2025
Tower of Hanoi
JOrE20
9,990
7ms
20 Dec 2025
Prime Numbers
JOrE20
168
4ms
20 Dec 2025
π
JOrE20
917
4ms
20 Dec 2025
Niven Numbers
JOrE20
212
4ms
20 Dec 2025
Leap Years
JOrE20
606
16ms
20 Dec 2025
Kolakoski Constant
JOrE20
916
4ms
20 Dec 2025
Hilbert Curve
JOrE20
15,241
9ms
20 Dec 2025
Fibonacci
JOrE20
229
4ms
20 Dec 2025
Evil Numbers
JOrE20
167
4ms
20 Dec 2025
γ
JOrE20
917
4ms
20 Dec 2025
Emojify
JOrE20
862
8ms
20 Dec 2025
Divisors
JOrE20
690
67ms
20 Dec 2025
λ
JOrE20
922
5ms
20 Dec 2025
Arithmetic Numbers
JOrE20
52,779
22ms
20 Dec 2025
99 Bottles of Beer
JOrE20
2,083
23ms
20 Dec 2025
Abundant Numbers
JOrE20
802
235ms
20 Dec 2025
Farey Sequence
FortuiteMan
🥈
98
12ms
18 Dec 2025
Tutorial
FortuiteMan
88
5ms
13 Dec 2025
Quine
CornerMercury
🥉
259
5ms
8 Dec 2025
12 Days of Christmas
snoozingnewt
5,417
6ms
6 Dec 2025
Niven Numbers
snoozingnewt
215
4ms
6 Dec 2025
Emirp Numbers
snoozingnewt
247
4ms
6 Dec 2025
Happy Numbers
snoozingnewt
218
4ms
6 Dec 2025
Pernicious Numbers
snoozingnewt
238
4ms
6 Dec 2025
Prime Numbers (Long)
snoozingnewt
526
1,423ms
6 Dec 2025
Prime Numbers
snoozingnewt
503
18ms
6 Dec 2025
Fibonacci
snoozingnewt
229
4ms
6 Dec 2025
Emojify
snoozingnewt
862
8ms
6 Dec 2025
Divisors
snoozingnewt
690
63ms
6 Dec 2025